Gas burner



June 17, 1958 D. G. PATTINSON GAS BURNER Filed Jan. 16, 1956 IN VEN TOR. 3811M G- a/f/J a r United States Patent 2,839,131 GAS BURNER Darwin G. Pattinson, Hutchinson, Kans. Application January 16, 1956, Serial No. 559,435

1 Claim. or. 158-99) This invention has to do with improvements in gas burners and has for its primary object the production of a steady, substantially noiseless, pressure flame either within a combustion chamber or in an open space, comparable to that produced by pressure burners but utilizing only the gas pressure emanating from a nozzle forming a part of the burner and having improved combustion efliciency by virtue of a double jet action resulting in the drawingin of an appreciably greater volume of air than is made possible in conventional gravity burners.

It is the most important object of the instant invention to provide a gas burner of the aforementioned character that lends itself to improved control or throttling by virtue of the fact that the correct amount of air is always automatically drawn into the gas for admixture therewith, dependent upon the gas pressure emanating from the orifice of the gas nozzle.

It is another important object of the present invention to provide in a gas burner, an improved means of admixing virtually any type of combustible gas with air whereby to produce heat for home appliances, commercial and industrial heating plants, and virtually all kinds of processing operations.

It is a further object of the instant invention to provide a gas burner operable efliciently throughout a wide range of gas pressure and formed in a manner to permit utilization of lightweight, relatively thin, inexpensive materials, by virtue of the fact that the entire burner is capable of withstanding an appreciable amount of heat, all as the result of an improved air flow therethrough.

A still further object of the present invention is to provide a gas burner having a thin wall tube therewithin for receiving gas and air mixture and spaced from the inner walls of the valve body for increased. flow of air therearound from the air inlet end of said body to the discharge end thereof.

Additional objects include important details of construction to be made clear or become apparent as the following specification progresses, reference being had to the accompanying drawing, wherein:

Figure 1 is a substantially central, longitudinal, crosssectional view through a gas burner made pursuant to the instant invention.

Fig. 2 is a transverse, cross-sectional view taken on line II II of Fig. 1, looking in the direction of the arrows; and

Fig. 3 is a transverse, cross-sectional view taken on line IIIIII of Fig. 1, looking in the direction of the arrows.

The aforementioned hollow, elongated burner body shown in the drawing is generally designated by the numeral and consists of a pair of identical, opposed end elements 12 and 14 that are substantially frusto-conical whereby the same progressively increase in diameter as air inlet end 16 of element 12 and discharge end 18 of element 14, are approached.

The two elements 12 and 14 are interconnected by a median cylindrical member 29 of uniform diameter and partially telescoped within the proximal ends of the eleice ments 12 and 14. External screw threads 22 throughout the length of the number 20 serve as a. preferred means for releasably interconnecting the member 20 with the elements 12 and 14.

In the embodiment of my invention chosen for illustration, the end elements 12 and 14 consist of'a pair of malleable reducing couplings screwed together with the member 20 that consists of an all-thread conventional nipple.

A spider, broadly designated by the numeral 24, is disposed within the air inlet end 16 of the body 10 and includes a central hub 26 having a plurality of radial spokes 28 integrally interconnecting the hub 26 and the element 12.

A gas nozzle '30, connected with a suitable source of gas supply (not shown) through conduit 32, extends through the hub 26 and is provided with external screw threads 34 to releasably connect the nozzle 30 with the hub 26. Nozzle 30 has a discharge orifice 36 for directing gas into the body 10 along the longitudinal axis of the latter.

An elongated thin wall, cylindrical tube 38 telescoped within the member 20 coaxially therewith, extends throughout the length of the member 20 and therebeyond into the element 14 terminating in spaced relationship to the discharge end 18 of body 10. The outside diameter of the tube 38 is appreciably less than the inside diameter of the member 2i), presenting, therefore, a space 40 surrounding the tube 38 within the member 20 for flow of air around the tube 38 as shown by the arrows in Fig. 1. Tube 38 is held in place with respect to the member 20 by a plurality of radial spacers 42 integrally interconnecting the member 20 and the tube 38 therebetween adjacent the element 12.

It is seen from the foregoing that there has been presented a gravity burner wherein air is not only drawn through the inlet 16 by pressure of gas emanating from the orifice 36 for admixture therewith and flow through the tube 38, but is drawn into the body 10 through inlet 16 for flow along the outer surfaces of the tube 38 and ultimate admixture with the gas and air emanating from the tube 38 prior to discharge at the outlet end 18 of body 10.

By virtue of such double action flow of air, perfect combustion is produced and the resulting flame is steady and substantially noiseless. It is unnecessary, through a burner construction of the aforedescribed nature, to rely upon additional pressure for the gas emanating from nozzle 30 since the increased air flow takes place regardless of the gas pressure at orifice 36. It is possible, through the construction shown in the drawing, to either utilize a plurality of burners for a given application, or employ a large single burner since the efficiency of the burner is not dependent upon its overall dimensions.

A removable ring 39 is threaded into the tube 38 at the outlet end of the latter for stabilizing the flame and keeping it from burning away from the outlet end of tube 38 when the burner is placed under draft conditions in a boiler or furnace. Ring 39 also permits changing the size of orifice 36 as desired without adversely afiecting the operation of the burner.

From the foregoing it is appreciated that all of the aims and objects initially set forth herein may be obtained through the form of the invention chosen for illustration or through other embodiments utilizing the principles hereinabove set forth.

Having thus described the invention what is claimed as new and desired to be secured by Letters Patent is:

A gravity burner for producing a steady, substantially noiseless, pressure flame utilizing gas pressure alone, comprising an elongated, hollow body having a discharge end and an opposed air inlet end, said body including a pair of identical, substantially frusto-conical, front and rear tubular end elements, progressively increasing in diameter as the discharge end and the air inlet end respectively are approached, and a cylindrical, open-ended median member having a uniform internal diameter, said member being coaxial with the endelements and haying its ends attached therewithin; screw threads connecting the member with said elements; a spider entirely within the body at said air inlet end and having a central hub provided with a plurality of radialspokes integrally interconnecting the hub and the rear one of said elements; a nozzle extending through said hub for directing gas into the body along the longitudinal axis thereof; screw threads connecting the hub and said nozzle; an elongated, cylindrical open-ended tube having a uniform internal and external diameter, disposed coaxially with said member and spaced from said nozzle, said tube extending from one end of the member, through the latter, and

cent said one endof the member and the proximal end of the tube, said spacers integrally interconnecting the tube and the member therebetween, there being a space within the member surrounding the tube to provide a generally annular flow of air from the inlet to said discharge end, dependent on the pressure of gas emanating References Cited in the file of this patent UNITED STATES PATENTS 1,428,400 Schroeder Sept. 5, 1922 1,731,307 Hileman Oct. 15, 1929 1,739,161 McKee Decv 10, 1929 2,637,972 Laucher May 12, 1953 2,731,009 Pocrass et al. Ian. 17, 1956 FOREIGN PATENTS V 495,469 Germany Apr. 6, 1927 229,158 1943 Switzerland Dec. 16, 

